Is io.netty:netty-codec-http affected by CVE-2026-42587?

Maven io.netty:netty-codec-http is affected in >=4.2.0.Alpha1 <4.2.13.Final, <4.1.133.Final.

Is CVE-2026-42587 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

high

CVE-2026-42587

Q: Is CVE-2026-42587 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

Maven · io.netty:netty-codec-http • Maven · io.netty:netty-codec-http2

Summary

Netty: HttpContentDecompressor maxAllocation bypass when Content-Encoding set to br/zstd/snappy leads to decompression bomb DoS

Severity: high
EPSS: 0.5% (p40)
Also known as: GHSA-f6hv-jmp6-3vwv#io.netty:netty-codec-http, GHSA-f6hv-jmp6-3vwv#io.netty:netty-codec-http2
Published: 2026-05-07

References

Related advisories

CVE-2026-42584 — high · Maven/io.netty:netty-codec-http
CVE-2026-33870 — high · Maven/io.netty:netty-codec-http
CVE-2026-50020 — medium · Maven/io.netty:netty-codec-http
CVE-2026-42585 — medium · Maven/io.netty:netty-codec-http
CVE-2026-42581 — medium · Maven/io.netty:netty-codec-http
CVE-2026-42580 — medium · Maven/io.netty:netty-codec-http
CVE-2026-41417 — medium · Maven/io.netty:netty-codec-http
CVE-2025-67735 — medium · Maven/io.netty:netty-codec-http

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.